From the answer:
Hello there, Julie .... It's nice to see you in the QuickBooks Community.... I'd be happy to help share some troubleshooting steps to ensure you can attach the file and open it with Right Networks.

From the answer:
It depends.... Why there are two line items?... When you review your invoices, do you see that detail?... It sort of sounds like you're using a sales tax group that contains two tax items, where one has a 0.00% rate.